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Milwaukee 2780-21 M18 Fuel Cordless Grinder Kit

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SKU MILW2780-21

18 Volt, 4-1/2" / 5" Grinder, Paddle Switch No-Lock Kit

The world's first cordless grinder delivers the power of a corded grinder with up to 2X more run time and up to 10X longer motor life. The M18 FUEL 4-1/2" / 5" Grinder supplies maximum sustained power to complete the toughest grinding, surface preparation and cutting applications. The POWERSTATE Brushless Motor provides up to 10X longer motor life and lower cost of ownership. The Milwaukee REDLITHIUM XC5.0 Battery is the most durable pack on the market and provides up to 2X more run time than standard Lithium-Ion batteries. The grinder features REDLINK PLUS Intelligence, the most advanced system of cordless power tool electronics, for maximum performance. The 18-volt lithium-ion grinder's thin body design gives it optimized balance to rest easily in your hands. Tool-free accessory changes and guard adjustments mean less downtime during work. The grinder is built with the same tool body, gearing system and anti-vibration side handle as Milwaukee's legendary high-performance corded grinders for maximum durability on the job. Includes an M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack and a carrying case.

Standard Equipment:

  • 2780-21 M18 Fuel Grinder
  • Side Handle
  • One M18 REDLITHIUM XC 5.0 Extended Capacity Battery Pack
  • Multi-Volt Battery Charger
  • Wheel Guard
  • Flange Nuts
  • Spanner Wrench
  • Carrying Case

Optional Accessories:

Optional Accessories:


  • Rating: 18 Volt Li-Ion
  • Battery Capacity: 47 Watt-hrs
  • No-load SPM: 8,500
  • Switch Type: Paddle
  • Weight: 5.8 lbs


  • POWERSTATE Brushless Motor: Delivers maximum power and up to 10X longer motor life.
  • REDLINK PLUS Intelligence provides optimized performance, electronic clutch, and overload protection using total system communication between tool, battery and charger.
  • REDLITHIUM XC 5.0 Battery Pack provides superior pack construction, electronics, and performance to deliver 2X more run-time and more work over pack life.
  • POWER TO GRIND: World's first cordless grinder with corded performance.
  • DURABILITY: Same metal housing & gearing system as legendary high performance corded grinders.
  • 100% tool free: Make all accessory changes and guard adjustments without a wrench for increased productivity.
  • Paddle-switch design: Provides increased comfort and ease-of-use when operating in various positions.

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